Revert "SpinBox: hide VKB when appropriate"

This reverts commit e64180b6

.
TextInput does commit & hide no need to do it here

Change-Id: I29c9e9421afd957457c648dc07270ee5dd7ca8e5
Reviewed-by: J-P Nurmi <jpnurmi@theqtcompany.com>

src/controls/SpinBox.qml

@@ -309,8 +309,6 @@ Control {
         }
         onAccepted: {
             input.text = validator.text
-            Qt.inputMethod.commit()
-            Qt.inputMethod.hide()
             selectValue()
         }